diff --git a/modules/chanserv/src/access.rs b/modules/chanserv/src/access.rs
index 5728e0d..836da55 100644
--- a/modules/chanserv/src/access.rs
+++ b/modules/chanserv/src/access.rs
@@ -69,6 +69,7 @@ fn is_founder(me: &str, from: &Sender, chan: &str, ctx: &mut ServiceCtx, db: &dy
             ctx.notice(me, from.uid, format!("Only \x02{chan}\x02's founder can change access."));
             false
         }
-        Some(_) => true,
+        // Founder, but a staff-suspended channel is frozen — no access changes.
+        Some(_) => !super::suspended_block(me, from, chan, ctx, db),
     }
 }
diff --git a/modules/chanserv/src/flags.rs b/modules/chanserv/src/flags.rs
index 0b00ebe..651b6bd 100644
--- a/modules/chanserv/src/flags.rs
+++ b/modules/chanserv/src/flags.rs
@@ -45,6 +45,9 @@ pub fn handle(me: &str, from: &Sender, chan: &str, args: &[&str], ctx: &mut Serv
         ctx.notice(me, from.uid, format!("You need the founder or the \x02a\x02 flag to change access on \x02{chan}\x02."));
         return;
     }
+    if super::suspended_block(me, from, chan, ctx, db) {
+        return; // a staff-suspended channel is frozen: no flag changes either
+    }
     if info.founder.eq_ignore_ascii_case(target) {
         ctx.notice(me, from.uid, "The founder's access is set with \x02SET FOUNDER\x02, not flags.");
         return;
diff --git a/modules/chanserv/src/lib.rs b/modules/chanserv/src/lib.rs
index 0157a2a..939f3e4 100644
--- a/modules/chanserv/src/lib.rs
+++ b/modules/chanserv/src/lib.rs
@@ -378,7 +378,12 @@ fn peace_blocks(me: &str, from: &Sender, chan: &str, target_uid: &str, ctx: &mut
     if target_uid == from.uid {
         return false;
     }
-    if info.access_rank(net.account_of(target_uid)) >= info.access_rank(from.account) {
+    // Group-aware rank: channel_caps resolves !group access (and founder), so PEACE
+    // protects a member whose access comes via a group, not just direct entries —
+    // ChannelView::access_rank is group-blind and let a plain op act against a
+    // group-SOP it should protect.
+    let rank = |account: Option<&str>| account.map_or(echo_api::Rank::None, |a| db.channel_caps(chan, a).rank);
+    if rank(net.account_of(target_uid)) >= rank(from.account) {
         ctx.notice(me, from.uid, "\x02PEACE\x02 is set: you can't act against someone with equal or higher access.");
         return true;
     }
diff --git a/modules/chanserv/src/mode.rs b/modules/chanserv/src/mode.rs
index f2a3fec..19a42f1 100644
--- a/modules/chanserv/src/mode.rs
+++ b/modules/chanserv/src/mode.rs
@@ -24,6 +24,9 @@ pub fn handle(me: &str, from: &Sender, args: &[&str], ctx: &mut ServiceCtx, db:
         ctx.notice(me, from.uid, format!("Only \x02{chan}\x02's founder can change its modes."));
         return;
     }
+    if super::suspended_block(me, from, chan, ctx, db) {
+        return; // a staff-suspended channel is frozen: no mode changes either
+    }
     // Reject an extban the network has turned off, before relaying anything.
     for mask in ban_masks(&args[2..], |m, adding| db.chanmode_takes_param(m, adding)) {
         let core = mask.strip_prefix('!').unwrap_or(mask); // extbans may be inverted